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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / usb / serial / cp210x.c
blobe5ac744ac73f967466f09fd1a03bb0779e322161
1 /*
2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
3 *
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
9 *
10 * Support to set flow control line levels using TIOCMGET and TIOCMSET
11 * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
12 * control thanks to Munir Nassar nassarmu@real-time.com
13 *
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/tty.h>
20 #include <linux/tty_flip.h>
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/usb.h>
24 #include <linux/uaccess.h>
25 #include <linux/usb/serial.h>
26
27 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
28
29 /*
30 * Function Prototypes
31 */
32 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
33 static void cp210x_close(struct usb_serial_port *);
34 static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
35 static void cp210x_get_termios_port(struct usb_serial_port *port,
36 unsigned int *cflagp, unsigned int *baudp);
37 static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
38 struct ktermios *);
39 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
40 struct ktermios*);
41 static int cp210x_tiocmget(struct tty_struct *);
42 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
43 static int cp210x_tiocmset_port(struct usb_serial_port *port,
44 unsigned int, unsigned int);
45 static void cp210x_break_ctl(struct tty_struct *, int);
46 static int cp210x_startup(struct usb_serial *);
47 static void cp210x_release(struct usb_serial *);
48 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
49
50 static const struct usb_device_id id_table[] = {
51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
59 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
60 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
61 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
62 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
63 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
73 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
74 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
78 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
79 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
80 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
81 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
82 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
83 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
84 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
85 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
86 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
87 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
88 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
89 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
93 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
94 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
95 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
96 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
107 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
108 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
109 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
110 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
111 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
112 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
113 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
114 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
115 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
116 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
117 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
118 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
119 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
120 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
121 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
122 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
123 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
124 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
125 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
128 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
129 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
130 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
131 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
132 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
133 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
134 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
135 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
136 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
137 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
138 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
139 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
140 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
141 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
142 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
143 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
144 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
145 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
146 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
147 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
148 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
149 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
150 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
151 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
152 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
153 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
154 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
155 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
156 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
157 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
158 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
159 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
160 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
161 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
162 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
163 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
164 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
165 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
166 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
167 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
168 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
169 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
170 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
171 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
172 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
173 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
174 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
175 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
176 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
177 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
178 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
179 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
180 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
181 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
182 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
183 { } /* Terminating Entry */
184 };
185
186 MODULE_DEVICE_TABLE(usb, id_table);
187
188 struct cp210x_serial_private {
189 __u8 bInterfaceNumber;
190 };
191
192 static struct usb_serial_driver cp210x_device = {
193 .driver = {
194 .owner = THIS_MODULE,
195 .name = "cp210x",
196 },
197 .id_table = id_table,
198 .num_ports = 1,
199 .bulk_in_size = 256,
200 .bulk_out_size = 256,
201 .open = cp210x_open,
202 .close = cp210x_close,
203 .break_ctl = cp210x_break_ctl,
204 .set_termios = cp210x_set_termios,
205 .tiocmget = cp210x_tiocmget,
206 .tiocmset = cp210x_tiocmset,
207 .attach = cp210x_startup,
208 .release = cp210x_release,
209 .dtr_rts = cp210x_dtr_rts
210 };
211
212 static struct usb_serial_driver * const serial_drivers[] = {
213 &cp210x_device, NULL
214 };
215
216 /* Config request types */
217 #define REQTYPE_HOST_TO_INTERFACE 0x41
218 #define REQTYPE_INTERFACE_TO_HOST 0xc1
219 #define REQTYPE_HOST_TO_DEVICE 0x40
220 #define REQTYPE_DEVICE_TO_HOST 0xc0
221
222 /* Config request codes */
223 #define CP210X_IFC_ENABLE 0x00
224 #define CP210X_SET_BAUDDIV 0x01
225 #define CP210X_GET_BAUDDIV 0x02
226 #define CP210X_SET_LINE_CTL 0x03
227 #define CP210X_GET_LINE_CTL 0x04
228 #define CP210X_SET_BREAK 0x05
229 #define CP210X_IMM_CHAR 0x06
230 #define CP210X_SET_MHS 0x07
231 #define CP210X_GET_MDMSTS 0x08
232 #define CP210X_SET_XON 0x09
233 #define CP210X_SET_XOFF 0x0A
234 #define CP210X_SET_EVENTMASK 0x0B
235 #define CP210X_GET_EVENTMASK 0x0C
236 #define CP210X_SET_CHAR 0x0D
237 #define CP210X_GET_CHARS 0x0E
238 #define CP210X_GET_PROPS 0x0F
239 #define CP210X_GET_COMM_STATUS 0x10
240 #define CP210X_RESET 0x11
241 #define CP210X_PURGE 0x12
242 #define CP210X_SET_FLOW 0x13
243 #define CP210X_GET_FLOW 0x14
244 #define CP210X_EMBED_EVENTS 0x15
245 #define CP210X_GET_EVENTSTATE 0x16
246 #define CP210X_SET_CHARS 0x19
247 #define CP210X_GET_BAUDRATE 0x1D
248 #define CP210X_SET_BAUDRATE 0x1E
249
250 /* CP210X_IFC_ENABLE */
251 #define UART_ENABLE 0x0001
252 #define UART_DISABLE 0x0000
253
254 /* CP210X_(SET|GET)_BAUDDIV */
255 #define BAUD_RATE_GEN_FREQ 0x384000
256
257 /* CP210X_(SET|GET)_LINE_CTL */
258 #define BITS_DATA_MASK 0X0f00
259 #define BITS_DATA_5 0X0500
260 #define BITS_DATA_6 0X0600
261 #define BITS_DATA_7 0X0700
262 #define BITS_DATA_8 0X0800
263 #define BITS_DATA_9 0X0900
264
265 #define BITS_PARITY_MASK 0x00f0
266 #define BITS_PARITY_NONE 0x0000
267 #define BITS_PARITY_ODD 0x0010
268 #define BITS_PARITY_EVEN 0x0020
269 #define BITS_PARITY_MARK 0x0030
270 #define BITS_PARITY_SPACE 0x0040
271
272 #define BITS_STOP_MASK 0x000f
273 #define BITS_STOP_1 0x0000
274 #define BITS_STOP_1_5 0x0001
275 #define BITS_STOP_2 0x0002
276
277 /* CP210X_SET_BREAK */
278 #define BREAK_ON 0x0001
279 #define BREAK_OFF 0x0000
280
281 /* CP210X_(SET_MHS|GET_MDMSTS) */
282 #define CONTROL_DTR 0x0001
283 #define CONTROL_RTS 0x0002
284 #define CONTROL_CTS 0x0010
285 #define CONTROL_DSR 0x0020
286 #define CONTROL_RING 0x0040
287 #define CONTROL_DCD 0x0080
288 #define CONTROL_WRITE_DTR 0x0100
289 #define CONTROL_WRITE_RTS 0x0200
290
291 /*
292 * cp210x_get_config
293 * Reads from the CP210x configuration registers
294 * 'size' is specified in bytes.
295 * 'data' is a pointer to a pre-allocated array of integers large
296 * enough to hold 'size' bytes (with 4 bytes to each integer)
297 */
298 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
299 unsigned int *data, int size)
300 {
301 struct usb_serial *serial = port->serial;
302 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
303 __le32 *buf;
304 int result, i, length;
305
306 /* Number of integers required to contain the array */
307 length = (((size - 1) | 3) + 1) / 4;
308
309 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
310 if (!buf) {
311 dev_err(&port->dev, "%s - out of memory.\n", __func__);
312 return -ENOMEM;
313 }
314
315 /* Issue the request, attempting to read 'size' bytes */
316 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
317 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
318 spriv->bInterfaceNumber, buf, size,
319 USB_CTRL_GET_TIMEOUT);
320
321 /* Convert data into an array of integers */
322 for (i = 0; i < length; i++)
323 data[i] = le32_to_cpu(buf[i]);
324
325 kfree(buf);
326
327 if (result != size) {
328 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
329 __func__, request, size, result);
330 if (result > 0)
331 result = -EPROTO;
332
333 return result;
334 }
335
336 return 0;
337 }
338
339 /*
340 * cp210x_set_config
341 * Writes to the CP210x configuration registers
342 * Values less than 16 bits wide are sent directly
343 * 'size' is specified in bytes.
344 */
345 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
346 unsigned int *data, int size)
347 {
348 struct usb_serial *serial = port->serial;
349 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
350 __le32 *buf;
351 int result, i, length;
352
353 /* Number of integers required to contain the array */
354 length = (((size - 1) | 3) + 1) / 4;
355
356 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
357 if (!buf) {
358 dev_err(&port->dev, "%s - out of memory.\n", __func__);
359 return -ENOMEM;
360 }
361
362 /* Array of integers into bytes */
363 for (i = 0; i < length; i++)
364 buf[i] = cpu_to_le32(data[i]);
365
366 if (size > 2) {
367 result = usb_control_msg(serial->dev,
368 usb_sndctrlpipe(serial->dev, 0),
369 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
370 spriv->bInterfaceNumber, buf, size,
371 USB_CTRL_SET_TIMEOUT);
372 } else {
373 result = usb_control_msg(serial->dev,
374 usb_sndctrlpipe(serial->dev, 0),
375 request, REQTYPE_HOST_TO_INTERFACE, data[0],
376 spriv->bInterfaceNumber, NULL, 0,
377 USB_CTRL_SET_TIMEOUT);
378 }
379
380 kfree(buf);
381
382 if ((size > 2 && result != size) || result < 0) {
383 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
384 __func__, request, size, result);
385 if (result > 0)
386 result = -EPROTO;
387
388 return result;
389 }
390
391 return 0;
392 }
393
394 /*
395 * cp210x_set_config_single
396 * Convenience function for calling cp210x_set_config on single data values
397 * without requiring an integer pointer
398 */
399 static inline int cp210x_set_config_single(struct usb_serial_port *port,
400 u8 request, unsigned int data)
401 {
402 return cp210x_set_config(port, request, &data, 2);
403 }
404
405 /*
406 * cp210x_quantise_baudrate
407 * Quantises the baud rate as per AN205 Table 1
408 */
409 static unsigned int cp210x_quantise_baudrate(unsigned int baud)
410 {
411 if (baud <= 300)
412 baud = 300;
413 else if (baud <= 600) baud = 600;
414 else if (baud <= 1200) baud = 1200;
415 else if (baud <= 1800) baud = 1800;
416 else if (baud <= 2400) baud = 2400;
417 else if (baud <= 4000) baud = 4000;
418 else if (baud <= 4803) baud = 4800;
419 else if (baud <= 7207) baud = 7200;
420 else if (baud <= 9612) baud = 9600;
421 else if (baud <= 14428) baud = 14400;
422 else if (baud <= 16062) baud = 16000;
423 else if (baud <= 19250) baud = 19200;
424 else if (baud <= 28912) baud = 28800;
425 else if (baud <= 38601) baud = 38400;
426 else if (baud <= 51558) baud = 51200;
427 else if (baud <= 56280) baud = 56000;
428 else if (baud <= 58053) baud = 57600;
429 else if (baud <= 64111) baud = 64000;
430 else if (baud <= 77608) baud = 76800;
431 else if (baud <= 117028) baud = 115200;
432 else if (baud <= 129347) baud = 128000;
433 else if (baud <= 156868) baud = 153600;
434 else if (baud <= 237832) baud = 230400;
435 else if (baud <= 254234) baud = 250000;
436 else if (baud <= 273066) baud = 256000;
437 else if (baud <= 491520) baud = 460800;
438 else if (baud <= 567138) baud = 500000;
439 else if (baud <= 670254) baud = 576000;
440 else if (baud < 1000000)
441 baud = 921600;
442 else if (baud > 2000000)
443 baud = 2000000;
444 return baud;
445 }
446
447 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
448 {
449 int result;
450
451 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
452 UART_ENABLE);
453 if (result) {
454 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
455 return result;
456 }
457
458 /* Configure the termios structure */
459 cp210x_get_termios(tty, port);
460
461 /* The baud rate must be initialised on cp2104 */
462 if (tty)
463 cp210x_change_speed(tty, port, NULL);
464
465 return usb_serial_generic_open(tty, port);
466 }
467
468 static void cp210x_close(struct usb_serial_port *port)
469 {
470 usb_serial_generic_close(port);
471 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
472 }
473
474 /*
475 * cp210x_get_termios
476 * Reads the baud rate, data bits, parity, stop bits and flow control mode
477 * from the device, corrects any unsupported values, and configures the
478 * termios structure to reflect the state of the device
479 */
480 static void cp210x_get_termios(struct tty_struct *tty,
481 struct usb_serial_port *port)
482 {
483 unsigned int baud;
484
485 if (tty) {
486 cp210x_get_termios_port(tty->driver_data,
487 &tty->termios.c_cflag, &baud);
488 tty_encode_baud_rate(tty, baud, baud);
489 } else {
490 unsigned int cflag;
491 cflag = 0;
492 cp210x_get_termios_port(port, &cflag, &baud);
493 }
494 }
495
496 /*
497 * cp210x_get_termios_port
498 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
499 */
500 static void cp210x_get_termios_port(struct usb_serial_port *port,
501 unsigned int *cflagp, unsigned int *baudp)
502 {
503 struct device *dev = &port->dev;
504 unsigned int cflag, modem_ctl[4];
505 unsigned int baud;
506 unsigned int bits;
507
508 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
509
510 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
511 *baudp = baud;
512
513 cflag = *cflagp;
514
515 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
516 cflag &= ~CSIZE;
517 switch (bits & BITS_DATA_MASK) {
518 case BITS_DATA_5:
519 dev_dbg(dev, "%s - data bits = 5\n", __func__);
520 cflag |= CS5;
521 break;
522 case BITS_DATA_6:
523 dev_dbg(dev, "%s - data bits = 6\n", __func__);
524 cflag |= CS6;
525 break;
526 case BITS_DATA_7:
527 dev_dbg(dev, "%s - data bits = 7\n", __func__);
528 cflag |= CS7;
529 break;
530 case BITS_DATA_8:
531 dev_dbg(dev, "%s - data bits = 8\n", __func__);
532 cflag |= CS8;
533 break;
534 case BITS_DATA_9:
535 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
536 cflag |= CS8;
537 bits &= ~BITS_DATA_MASK;
538 bits |= BITS_DATA_8;
539 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
540 break;
541 default:
542 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
543 cflag |= CS8;
544 bits &= ~BITS_DATA_MASK;
545 bits |= BITS_DATA_8;
546 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
547 break;
548 }
549
550 switch (bits & BITS_PARITY_MASK) {
551 case BITS_PARITY_NONE:
552 dev_dbg(dev, "%s - parity = NONE\n", __func__);
553 cflag &= ~PARENB;
554 break;
555 case BITS_PARITY_ODD:
556 dev_dbg(dev, "%s - parity = ODD\n", __func__);
557 cflag |= (PARENB|PARODD);
558 break;
559 case BITS_PARITY_EVEN:
560 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
561 cflag &= ~PARODD;
562 cflag |= PARENB;
563 break;
564 case BITS_PARITY_MARK:
565 dev_dbg(dev, "%s - parity = MARK\n", __func__);
566 cflag |= (PARENB|PARODD|CMSPAR);
567 break;
568 case BITS_PARITY_SPACE:
569 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
570 cflag &= ~PARODD;
571 cflag |= (PARENB|CMSPAR);
572 break;
573 default:
574 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
575 cflag &= ~PARENB;
576 bits &= ~BITS_PARITY_MASK;
577 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
578 break;
579 }
580
581 cflag &= ~CSTOPB;
582 switch (bits & BITS_STOP_MASK) {
583 case BITS_STOP_1:
584 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
585 break;
586 case BITS_STOP_1_5:
587 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
588 bits &= ~BITS_STOP_MASK;
589 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
590 break;
591 case BITS_STOP_2:
592 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
593 cflag |= CSTOPB;
594 break;
595 default:
596 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
597 bits &= ~BITS_STOP_MASK;
598 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
599 break;
600 }
601
602 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
603 if (modem_ctl[0] & 0x0008) {
604 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
605 cflag |= CRTSCTS;
606 } else {
607 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
608 cflag &= ~CRTSCTS;
609 }
610
611 *cflagp = cflag;
612 }
613
614 /*
615 * CP2101 supports the following baud rates:
616 *
617 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
618 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
619 *
620 * CP2102 and CP2103 support the following additional rates:
621 *
622 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
623 * 576000
624 *
625 * The device will map a requested rate to a supported one, but the result
626 * of requests for rates greater than 1053257 is undefined (see AN205).
627 *
628 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
629 * respectively, with an error less than 1%. The actual rates are determined
630 * by
631 *
632 * div = round(freq / (2 x prescale x request))
633 * actual = freq / (2 x prescale x div)
634 *
635 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
636 * or 1 otherwise.
637 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
638 * otherwise.
639 */
640 static void cp210x_change_speed(struct tty_struct *tty,
641 struct usb_serial_port *port, struct ktermios *old_termios)
642 {
643 u32 baud;
644
645 baud = tty->termios.c_ospeed;
646
647 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
648 * or to an arbitrary rate in [1M,2M].
649 *
650 * NOTE: B0 is not implemented.
651 */
652 baud = cp210x_quantise_baudrate(baud);
653
654 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
655 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
656 sizeof(baud))) {
657 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
658 if (old_termios)
659 baud = old_termios->c_ospeed;
660 else
661 baud = 9600;
662 }
663
664 tty_encode_baud_rate(tty, baud, baud);
665 }
666
667 static void cp210x_set_termios(struct tty_struct *tty,
668 struct usb_serial_port *port, struct ktermios *old_termios)
669 {
670 struct device *dev = &port->dev;
671 unsigned int cflag, old_cflag;
672 unsigned int bits;
673 unsigned int modem_ctl[4];
674
675 cflag = tty->termios.c_cflag;
676 old_cflag = old_termios->c_cflag;
677
678 if (tty->termios.c_ospeed != old_termios->c_ospeed)
679 cp210x_change_speed(tty, port, old_termios);
680
681 /* If the number of data bits is to be updated */
682 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
683 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
684 bits &= ~BITS_DATA_MASK;
685 switch (cflag & CSIZE) {
686 case CS5:
687 bits |= BITS_DATA_5;
688 dev_dbg(dev, "%s - data bits = 5\n", __func__);
689 break;
690 case CS6:
691 bits |= BITS_DATA_6;
692 dev_dbg(dev, "%s - data bits = 6\n", __func__);
693 break;
694 case CS7:
695 bits |= BITS_DATA_7;
696 dev_dbg(dev, "%s - data bits = 7\n", __func__);
697 break;
698 case CS8:
699 bits |= BITS_DATA_8;
700 dev_dbg(dev, "%s - data bits = 8\n", __func__);
701 break;
702 /*case CS9:
703 bits |= BITS_DATA_9;
704 dev_dbg(dev, "%s - data bits = 9\n", __func__);
705 break;*/
706 default:
707 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
708 bits |= BITS_DATA_8;
709 break;
710 }
711 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
712 dev_dbg(dev, "Number of data bits requested not supported by device\n");
713 }
714
715 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
716 (old_cflag & (PARENB|PARODD|CMSPAR))) {
717 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
718 bits &= ~BITS_PARITY_MASK;
719 if (cflag & PARENB) {
720 if (cflag & CMSPAR) {
721 if (cflag & PARODD) {
722 bits |= BITS_PARITY_MARK;
723 dev_dbg(dev, "%s - parity = MARK\n", __func__);
724 } else {
725 bits |= BITS_PARITY_SPACE;
726 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
727 }
728 } else {
729 if (cflag & PARODD) {
730 bits |= BITS_PARITY_ODD;
731 dev_dbg(dev, "%s - parity = ODD\n", __func__);
732 } else {
733 bits |= BITS_PARITY_EVEN;
734 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
735 }
736 }
737 }
738 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
739 dev_dbg(dev, "Parity mode not supported by device\n");
740 }
741
742 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
743 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
744 bits &= ~BITS_STOP_MASK;
745 if (cflag & CSTOPB) {
746 bits |= BITS_STOP_2;
747 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
748 } else {
749 bits |= BITS_STOP_1;
750 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
751 }
752 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
753 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
754 }
755
756 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
757 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
758 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
759 __func__, modem_ctl[0], modem_ctl[1],
760 modem_ctl[2], modem_ctl[3]);
761
762 if (cflag & CRTSCTS) {
763 modem_ctl[0] &= ~0x7B;
764 modem_ctl[0] |= 0x09;
765 modem_ctl[1] = 0x80;
766 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
767 } else {
768 modem_ctl[0] &= ~0x7B;
769 modem_ctl[0] |= 0x01;
770 modem_ctl[1] |= 0x40;
771 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
772 }
773
774 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
775 __func__, modem_ctl[0], modem_ctl[1],
776 modem_ctl[2], modem_ctl[3]);
777 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
778 }
779
780 }
781
782 static int cp210x_tiocmset(struct tty_struct *tty,
783 unsigned int set, unsigned int clear)
784 {
785 struct usb_serial_port *port = tty->driver_data;
786 return cp210x_tiocmset_port(port, set, clear);
787 }
788
789 static int cp210x_tiocmset_port(struct usb_serial_port *port,
790 unsigned int set, unsigned int clear)
791 {
792 unsigned int control = 0;
793
794 if (set & TIOCM_RTS) {
795 control |= CONTROL_RTS;
796 control |= CONTROL_WRITE_RTS;
797 }
798 if (set & TIOCM_DTR) {
799 control |= CONTROL_DTR;
800 control |= CONTROL_WRITE_DTR;
801 }
802 if (clear & TIOCM_RTS) {
803 control &= ~CONTROL_RTS;
804 control |= CONTROL_WRITE_RTS;
805 }
806 if (clear & TIOCM_DTR) {
807 control &= ~CONTROL_DTR;
808 control |= CONTROL_WRITE_DTR;
809 }
810
811 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
812
813 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
814 }
815
816 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
817 {
818 if (on)
819 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
820 else
821 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
822 }
823
824 static int cp210x_tiocmget(struct tty_struct *tty)
825 {
826 struct usb_serial_port *port = tty->driver_data;
827 unsigned int control;
828 int result;
829
830 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
831
832 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
833 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
834 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
835 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
836 |((control & CONTROL_RING)? TIOCM_RI : 0)
837 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
838
839 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
840
841 return result;
842 }
843
844 static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
845 {
846 struct usb_serial_port *port = tty->driver_data;
847 unsigned int state;
848
849 if (break_state == 0)
850 state = BREAK_OFF;
851 else
852 state = BREAK_ON;
853 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
854 state == BREAK_OFF ? "off" : "on");
855 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
856 }
857
858 static int cp210x_startup(struct usb_serial *serial)
859 {
860 struct usb_host_interface *cur_altsetting;
861 struct cp210x_serial_private *spriv;
862
863 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
864 if (!spriv)
865 return -ENOMEM;
866
867 cur_altsetting = serial->interface->cur_altsetting;
868 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
869
870 usb_set_serial_data(serial, spriv);
871
872 return 0;
873 }
874
875 static void cp210x_release(struct usb_serial *serial)
876 {
877 struct cp210x_serial_private *spriv;
878
879 spriv = usb_get_serial_data(serial);
880 kfree(spriv);
881 }
882
883 module_usb_serial_driver(serial_drivers, id_table);
884
885 MODULE_DESCRIPTION(DRIVER_DESC);
886 MODULE_LICENSE("GPL");
Linux with added FPC-III support